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diff --git a/431/CH3/EX3.1/EX3_1.sce b/431/CH3/EX3.1/EX3_1.sce
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+//calculating number of turns,primary and secondary currents and value of flux
+//Chapter 3
+//Example 3.1
+//page 196
+clear;
+clc; 
+disp("Example 3.1")
+kVA=500;                //rating
+V1=11000;                //primary voltage in volts
+V2=400;                  //secondary voltage in volts
+N2=100;                  //number of turns in secondary winding
+f=50;                    //frequency in hertz
+N1=(V1*N2)/V2;            //number of turns in primary winding
+printf("number of turns in primary  winding,N1=%dturns",N1)
+I1=(kVA*1000)/V1;
+I2=(kVA*1000)/V2
+printf("\nprimary current,I1=%fA",I1)
+printf("\nsecondary current,I2=%fA",I2)
+E1=V1;
+phi=E1/(4.44*f*N1)
+printf("\nmaximium flux in the core=%fWb",phi)
+\ No newline at end of file